Abu Omar al-Shishani

Tarkhan Batirashvili (born 1986), known by the kunya Abu Omar al-Shishani (meaning "Father of Omar the Chechen"), is a general of the Islamic State and field commander of the Islamic State of Iraq and Syria (ISIS).

Biography
Batirashvili was born in Birkiani in the Georgian SSR of the Soviet Union to a Muslim Georgian family, a family of the Pankisi Gorge/Kakheti-descended Kist people. He secretly helped Mujahideen into Russia from Chechnya during the Chechen Wars and even helped them in missions against Russian troops at times.

He later joined the Georgian Army and fought in the 2008 Russo-Georgian War, but in September 2010 he was arrested for illegally harboring weapons. He was transformed in prison, and vowed to fight for jihad, joining Chechen troops in Turkey to head for war-ravaged Syria in 2012. He led the Muhajireen Brigade, a unit of foreign fighters, in Syria as an ally of the Al-Nusra Front in the Battle of Aleppo. In late 2013 he was replaced as commander of the brigades by Salahuddin al-Shishani because he swore allegiance to the Islamic State of Iraq and Syria, while the Chechens had already sworn allegiance to Dokka Umarov. By 2014, he was ISIS' field commander.